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(No Model.)`

H. MOON. ROTARY STEAM ENGINE.

Patentewuly 14, 1885.

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,I Attorney UNITED STATES PATENT OFFICE.

HERMON MOON, OF GROVE CITY, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO WILLIAM MELLOR, OF SAME PLACE.

ROTARY sTEAM-ENGmE.

SPECIFICATION' forming part of Letters Patent No. 322,389, dated July 14, 1885.-

Application illed May 20, 1885. (No model.)

To all whom it may concern.-

Beit known that I, HERMON MOON, a citizen of the United States, and a resident of Grove City, in the county of Mercer and State 5 of Pennsylvania, have invented certain new and useful Improvements in Rotary Steam- Engines; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled 1o in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure l is a vertical cross-section of my improved engine taken through the cylinder.' Fig. 2 is a side view of the complete machine, and Fig. 3 is a perspective detail view of the piston-wheel.

Similar letters of reference indicate corre- 2o spending parts in all the gures.

In the drawings, A denotes the cylindersupporting frame which has the steam-induc tion and eduction ports marked, respectively, B and C. Induction-port B has a regulat- 5V ing-valve, D, which is operated by a handlever, E. At the bottom of the cylindrical steam-chamber is the usual cock or faucet, which is adapted to let off the priming or water of condensation. The piston-wheel F 3o is of the construction shown in Fig. 3, and is keyed eccentrically upon the shaft G. This wheel has two recesses, H and I, made in its periphery, recess H is provided with a block, J, which has a spiral spring, K, between it 5 and the body of the wheel. A metal band, L, the width of wheel F, spans circumferentially across the recess I, and has a hole or aperture, M, for the admission of steam into the recess. The frame A has a recess or way, N, in its 4o upper part, which is provided with a sliding latch or cut-oi', O, which is of the same width as piston-wheel F, and has one of its lower edges rounded or beveled. This latch has an upwardly-extending rod, I, upon the upper 4 5 end o which is a cross-head, Q. A ilatspring, R, is adjustably secured at one end to the frame and bears downwardly upon cross-head, Q, thus keeping the lower edge of the latch in contact with the periphery of the piston- 1wheel. Rod I is inserted through a stutting- 5o T denotes an oil-cup, which is suitably attached to the frame, and connected by a pipe or conduit to the recess N, so as to lubrcate the cut olii". Shaft Gr projects through similar 5 5 stuffing-boxes to those marked S, said boxes being secured to each side of the cylinder.l Shaft G also has the necessary bearings at its outer ends. 5

[n order to provide for a continuous even 6o pressure upon the sliding latch orcut-oii', I make the spring R, which bears upon the Y cross-head at the upper endof the latch-rod, adjustable up or down by means of a setscrew, U, inserted through the` bracket to 65 which the spring is attached and working through a slot in the head or block of the spring, so that by lowering the spring the pressure yupon the latch-rod may be increased to compensate for the wear at the 7o beveled lower end of the latch where this is in contact with the rotary disk or pistonwheel.

From the foregoing description, taken in connection with the drawings hereto annexed, 7 5 the operation of the machine will be readily understood. The steam, being introduced into port B, passes through aperture' M into re cess I and turns piston-wheel Fin the direction of the arrow. Block J, being always 8o pressed against the inside of the cylinder, prevents the steam from escaping past this point, and the latch O, being kept in contact with the periphery of piston-wheel F, prevents the steam from passing in that direction. theforce of the steam is applied upon the lower face of recess I, thereby turningthe wheel. When the piston-wheel F revolves and the f recess I comes up even with exhaust-port C, the steam is exhausted'.

Having thus described my invention I elaimand desire to secure by Letters Patent of the United States- The combination of thestationary steamcylinder having the oblique recess N in its 95 upper part, the Vrotary piston-wheel con- Thus all 85 l strueted as described, the sliding,` latch or cut-off having a rod Working through a stuffing-box in the upper part of the frame7 the cross-head at the upper end of said rod, and

In testimony that I claim the foregoing as my own I have hereunto affixed my signature iu presence of two witnesses.

HERMON MOON. 5 the spring bearing with its free end against Witnesses:

A DAVID KARR,

J. R. DAVIDSON.

said cross-head7 substantially as and for the purpose shown and set forth. 

